add questions 344,509

Author: rishabh1403

301-400/344-reverse-string.js

@@ -2,7 +2,7 @@
 Author :- Rishabh Jain <contact@rishabh1403.com>
 Solution for :- https://leetcode.com/problems/reverse-string/
 blog for this code :- https://rishabh1403.com/posts/coding/leetcode/2020/04/leetcode-reverse-string
-youtube video :- https://youtu.be/I6AUMvi13fc
+youtube video :- https://youtu.be/8j24rPjGBwU
 */
 
 

501-600/509-fibonacci-number.js

@@ -2,7 +2,7 @@
 Author :- Rishabh Jain <contact@rishabh1403.com>
 Solution for :- https://leetcode.com/problems/fibonacci-number/
 blog for this code :- https://rishabh1403.com/posts/coding/leetcode/2020/04/leetcode-fibonacci-number
-youtube video :- https://youtu.be/I6AUMvi13fc
+youtube video :- https://youtu.be/iyyhQfO_KKY
 */
 
 

README.md

@@ -34,9 +34,9 @@ Solutions of all the questions from Leetcode in JavaScript.
 
 - 268.Missing Number - [Question](https://leetcode.com/problems/missing-number/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/201-300/268-missing-number.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-missing-number) | [Youtube Video](https://youtu.be/I6AUMvi13fc)
 
-- 344.Reverse String - [Question](https://leetcode.com/problems/reverse-string/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/201-300/268-missing-number.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/04/leetcode-reverse-string) | [Youtube Video]()
+- 344.Reverse String - [Question](https://leetcode.com/problems/reverse-string/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/301-400/344-reverse-string.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/04/leetcode-reverse-string) | [Youtube Video](https://youtu.be/8j24rPjGBwU)
 
-- 509.Fibonacci Number - [Question](https://leetcode.com/problems/fibonacci-number/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/201-300/268-missing-number.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/04/leetcode-fibonacci-number) | [Youtube Video]()
+- 509.Fibonacci Number - [Question](https://leetcode.com/problems/fibonacci-number/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/501-600/509-fibonacci-number.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/04/leetcode-fibonacci-number) | [Youtube Video](https://youtu.be/iyyhQfO_KKY)
 
 - 709.To Lower Case - [Question](https://leetcode.com/problems/to-lower-case/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/701-800/709-to-lower-case.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-to-lower-case) | [Youtube Video](https://youtu.be/jFi7-YgIXJQ)